Overhaul installation process

The new commands are

$ cargo install-ra --client-code
$ cargo install-ra --server --jemalloc

6 files changed, 128 insertions, 58 deletions

diff --git a/.cargo/config b/.cargo/config
index 3ac2ce3363c..92a3acfd0b7 100644
--- a/.cargo/config
+++ b/.cargo/config
@@ -1,23 +1,23 @@
 [alias]
 # Automatically generates the ast and syntax kinds files
 gen-syntax   = "run --package ra_tools --bin ra_tools -- gen-syntax"
+
 # Extracts the tests from
 gen-tests    = "run --package ra_tools --bin ra_tools -- gen-tests"
-# Installs ra_lsp_server
-install-lsp = "install --path crates/ra_lsp_server --force"
-# Installs ra_lsp_server with the jemalloc feature
-jinstall-lsp = "install --path crates/ra_lsp_server --force --features jemalloc"
+
 # Installs the visual studio code extension
-install-code = "run --package ra_tools --bin ra_tools -- install-code"
+install-ra   = "run --package ra_tools --bin ra_tools -- install-ra"
+install-code = "run --package ra_tools --bin ra_tools -- install-ra" # just an alias
+
 # Formats the full repository or installs the git hook to do it automatically.
 format       = "run --package ra_tools --bin ra_tools -- format"
 format-hook  = "run --package ra_tools --bin ra_tools -- format-hook"
+
 # Run clippy
 lint         = "run --package ra_tools --bin ra_tools -- lint"
 
 # Runs the fuzzing test suite (currently only parser)
 fuzz-tests   = "run --package ra_tools --bin ra_tools -- fuzz-tests"
 
-render-test  = "run --package ra_cli -- render-test"
 # Parse a file. This should be piped the file contents
 parse        = "run --package ra_cli -- parse"
diff --git a/README.md b/README.md
index eabe004c7ed..5e9537ef1e7 100644
--- a/README.md
+++ b/README.md
@@ -32,10 +32,10 @@ For setup for other editors, see [./docs/user](./docs/user).
 $ git clone https://github.com/rust-analyzer/rust-analyzer && cd rust-analyzer
 
 # install both the language server and VS Code extension
-$ cargo install-code
+$ cargo install-ra
 
 # alternatively, install only the server. Binary name is `ra_lsp_server`.
-$ cargo install-lsp
+$ cargo install-ra --server
 ```
 ## Documentation
 
diff --git a/crates/ra_tools/src/lib.rs b/crates/ra_tools/src/lib.rs
index 79fbcd11d03..bb7845f7d96 100644
--- a/crates/ra_tools/src/lib.rs
+++ b/crates/ra_tools/src/lib.rs
@@ -79,6 +79,29 @@ pub fn project_root() -> PathBuf {
     Path::new(&env!("CARGO_MANIFEST_DIR")).ancestors().nth(2).unwrap().to_path_buf()
 }
 
+pub struct Cmd {
+    pub unix: &'static str,
+    pub windows: &'static str,
+    pub work_dir: &'static str,
+}
+
+impl Cmd {
+    pub fn run(self) -> Result<()> {
+        if cfg!(windows) {
+            run(self.windows, self.work_dir)
+        } else {
+            run(self.unix, self.work_dir)
+        }
+    }
+    pub fn run_with_output(self) -> Result<Output> {
+        if cfg!(windows) {
+            run_with_output(self.windows, self.work_dir)
+        } else {
+            run_with_output(self.unix, self.work_dir)
+        }
+    }
+}
+
 pub fn run(cmdline: &str, dir: &str) -> Result<()> {
     do_run(cmdline, dir, |c| {
         c.stdout(Stdio::inherit());
diff --git a/crates/ra_tools/src/main.rs b/crates/ra_tools/src/main.rs
index 7ed592f71cd..59d4ea6d34a 100644
--- a/crates/ra_tools/src/main.rs
+++ b/crates/ra_tools/src/main.rs
@@ -1,70 +1,73 @@
-use clap::{App, SubCommand};
+use clap::{App, Arg, SubCommand};
 use core::str;
 use ra_tools::{
-    gen_tests, generate, install_format_hook, run, run_clippy, run_fuzzer, run_rustfmt,
-    run_with_output, Overwrite, Result,
+    gen_tests, generate, install_format_hook, run, run_clippy, run_fuzzer, run_rustfmt, Cmd,
+    Overwrite, Result,
 };
 use std::{env, path::PathBuf};
 
+struct InstallOpt {
+    client: Option<ClientOpt>,
+    server: Option<ServerOpt>,
+}
+
+enum ClientOpt {
+    VsCode,
+}
+
+struct ServerOpt {
+    jemalloc: bool,
+}
+
 fn main() -> Result<()> {
     let matches = App::new("tasks")
         .setting(clap::AppSettings::SubcommandRequiredElseHelp)
         .subcommand(SubCommand::with_name("gen-syntax"))
         .subcommand(SubCommand::with_name("gen-tests"))
-        .subcommand(SubCommand::with_name("install-code"))
+        .subcommand(
+            SubCommand::with_name("install-ra")
+                .arg(Arg::with_name("server").long("--server"))
+                .arg(Arg::with_name("jemalloc").long("jemalloc").requires("server"))
+                .arg(Arg::with_name("client-code").long("client-code").conflicts_with("server")),
+        )
+        .alias("install-code")
         .subcommand(SubCommand::with_name("format"))
         .subcommand(SubCommand::with_name("format-hook"))
         .subcommand(SubCommand::with_name("fuzz-tests"))
         .subcommand(SubCommand::with_name("lint"))
         .get_matches();
-    match matches.subcommand_name().expect("Subcommand must be specified") {
-        "install-code" => {
-            if cfg!(target_os = "macos") {
-                fix_path_for_mac()?;
-            }
-            install_code_extension()?;
+    match matches.subcommand() {
+        ("install-ra", Some(matches)) => {
+            let opts = InstallOpt {
+                client: if matches.is_present("server") { None } else { Some(ClientOpt::VsCode) },
+                server: if matches.is_present("client-code") {
+                    None
+                } else {
+                    Some(ServerOpt { jemalloc: matches.is_present("jemalloc") })
+                },
+            };
+            install(opts)?
         }
-        "gen-tests" => gen_tests(Overwrite)?,
-        "gen-syntax" => generate(Overwrite)?,
-        "format" => run_rustfmt(Overwrite)?,
-        "format-hook" => install_format_hook()?,
-        "lint" => run_clippy()?,
-        "fuzz-tests" => run_fuzzer()?,
+        ("gen-tests", _) => gen_tests(Overwrite)?,
+        ("gen-syntax", _) => generate(Overwrite)?,
+        ("format", _) => run_rustfmt(Overwrite)?,
+        ("format-hook", _) => install_format_hook()?,
+        ("lint", _) => run_clippy()?,
+        ("fuzz-tests", _) => run_fuzzer()?,
         _ => unreachable!(),
     }
     Ok(())
 }
 
-fn install_code_extension() -> Result<()> {
-    run("cargo install --path crates/ra_lsp_server --force", ".")?;
-    if cfg!(windows) {
-        run(r"cmd.exe /c npm.cmd ci", "./editors/code")?;
-        run(r"cmd.exe /c npm.cmd run package", "./editors/code")?;
-    } else {
-        run(r"npm ci", "./editors/code")?;
-        run(r"npm run package", "./editors/code")?;
+fn install(opts: InstallOpt) -> Result<()> {
+    if cfg!(target_os = "macos") {
+        fix_path_for_mac()?
     }
-    if cfg!(windows) {
-        run(
-            r"cmd.exe /c code.cmd --install-extension ./ra-lsp-0.0.1.vsix --force",
-            "./editors/code",
-        )?;
-    } else {
-        run(r"code --install-extension ./ra-lsp-0.0.1.vsix --force", "./editors/code")?;
+    if let Some(client) = opts.client {
+        install_client(client)?;
     }
-    verify_installed_extensions()?;
-    Ok(())
-}
-
-fn verify_installed_extensions() -> Result<()> {
-    let exts = if cfg!(windows) {
-        run_with_output(r"cmd.exe /c code.cmd --list-extensions", ".")?
-    } else {
-        run_with_output(r"code --list-extensions", ".")?
-    };
-    if !str::from_utf8(&exts.stdout)?.contains("ra-lsp") {
-        Err("Could not install the Visual Studio Code extension. Please make sure you \
-             have at least NodeJS 10.x installed and try again.")?;
+    if let Some(server) = opts.server {
+        install_server(server)?;
     }
     Ok(())
 }
@@ -101,3 +104,47 @@ fn fix_path_for_mac() -> Result<()> {
 
     Ok(())
 }
+
+fn install_client(ClientOpt::VsCode: ClientOpt) -> Result<()> {
+    Cmd { unix: r"npm ci", windows: r"cmd.exe /c npm.cmd ci", work_dir: "./editors/code" }.run()?;
+
+    let code_in_path = Cmd {
+        unix: r"code --version",
+        windows: r"cmd.exe /c code.cmd --version",
+        work_dir: "./editors/code",
+    }
+    .run()
+    .is_ok();
+    if !code_in_path {
+        Err("Can't execute `code --version`. Perhaps it is not in $PATH?")?;
+    }
+
+    Cmd {
+        unix: r"code --install-extension ./ra-lsp-0.0.1.vsix --force",
+        windows: r"cmd.exe /c code.cmd --install-extension ./ra-lsp-0.0.1.vsix --force",
+        work_dir: "./editors/code",
+    }
+    .run()?;
+
+    let output = Cmd {
+        unix: r"code --list-extensions",
+        windows: r"cmd.exe /c code.cmd --list-extensions",
+        work_dir: ".",
+    }
+    .run_with_output()?;
+
+    if !str::from_utf8(&output.stdout)?.contains("ra-lsp") {
+        Err("Could not install the Visual Studio Code extension. \
+             Please make sure you have at least NodeJS 10.x installed and try again.")?;
+    }
+
+    Ok(())
+}
+
+fn install_server(opts: ServerOpt) -> Result<()> {
+    if opts.jemalloc {
+        run("cargo install --path crates/ra_lsp_server --force --features jemalloc", ".")
+    } else {
+        run("cargo install --path crates/ra_lsp_server --force", ".")
+    }
+}
diff --git a/docs/dev/README.md b/docs/dev/README.md
index 0a148ed3239..74c58d4afeb 100644
--- a/docs/dev/README.md
+++ b/docs/dev/README.md
@@ -66,7 +66,7 @@ typescript) and Emacs (in elisp). The `docs` top-level directory contains both
 developer and user documentation.
 
 We have some automation infra in Rust in the `crates/tool` package. It contains
-stuff like formatting checking, code generation and powers `cargo install-code`.
+stuff like formatting checking, code generation and powers `cargo install-ra`.
 The latter syntax is achieved with the help of cargo aliases (see `.cargo`
 directory).
 
@@ -84,7 +84,7 @@ However, launching a VS Code instance with locally build language server is
 possible. There's even a VS Code task for this, so just <kbd>F5</kbd> should
 work (thanks, [@andrew-w-ross](https://github.com/andrew-w-ross)!).
 
-I often just install development version with `cargo jinstall-lsp` and
+I often just install development version with `cargo install-ra --server --jemalloc` and
 restart the host VS Code.
 
 See [./debugging.md](./debugging.md) for how to attach to rust-analyzer with
@@ -110,7 +110,7 @@ ways:
 
 2. Run `npm test` from the command line. Although this is initiated from the
    command line it is not headless; it will also launch a temporary instance of
-   VS Code. 
+   VS Code.
 
 Due to the requirements of running the tests inside VS Code they are **not run
 on CI**. When making changes to the extension please ensure the tests are not
@@ -151,7 +151,7 @@ There's also two VS Code commands which might be of interest:
   $ cargo install --path crates/ra_lsp_server --force --features jemalloc
   ```
 
-  There's an alias for this: `cargo jinstall-lsp`.
+  There's an alias for this: `cargo install-ra --server --jemalloc`.
 
 * `Rust Analyzer: Syntax Tree` shows syntax tree of the current file/selection.
 
diff --git a/docs/user/README.md b/docs/user/README.md
index 8a576784928..122388a4270 100644
--- a/docs/user/README.md
+++ b/docs/user/README.md
@@ -1,6 +1,6 @@
 The main interface to rust-analyzer is the
 [LSP](https://microsoft.github.io/language-server-protocol/) implementation. To
-install lsp server, use `cargo install-lsp`, which is a shorthand for `cargo
+install lsp server, use `cargo install-ra --server`, which is a shorthand for `cargo
 install --package ra_lsp_server`. The binary is named `ra_lsp_server`, you
 should be able to use it with any LSP-compatible editor. We use custom
 extensions to LSP, so special client-side support is required to take full
@@ -33,7 +33,7 @@ following commands:
 ```
 $ git clone https://github.com/rust-analyzer/rust-analyzer.git --depth 1
 $ cd rust-analyzer
-$ cargo install-code
+$ cargo install-ra
 ```
 
 The automatic installation is expected to *just work* for common cases, if it